I've sprayed 3 trailers now with the rustoleum oil based paint and I've had great results. The only thing with this paint is it's super messy so anything that you do not want paint on you better cover it. Also clean up will take longer than the actually spray time I found out the hard way the first time I used it and ended up using about 3 gallons of gas because I ran out of mineral spirits. To spray it I used my airless house sprayer and the final product is pretty amazing but like I said the clean up is ridiculous when you have a 25' hose that it travels through. So the next thing I will be buying to finish my last trailer is this.
The reviews on it are really good and it's only $120 but what I like about it is cleanup should take about 10-15 minutes. Also if you do use this paint make sure to get lots of disposable gloves because once it's on your skin the only way to get it off is by washing your hands in gas lol!
Here's the very first trailer I did with this method my 1986 coachmen coventry.
Next trailer I did was a 16' horse trailer I had bought and completely redone from top to bottom. And is now my run around show cattle trailer. In this picture this paint is now over a year old and you can still see your reflection in it. (Just a little dirty)
And this trailer is currently in the remodeling process and is going to be resprayed with that wagner sprayer (not happy with the roller method I used on this side). I will also add this trailer to my current fw build thread because it's getting a lq added to the front. ( just a little interesting fact, this trailer used to be painted silver)
And the reflection in the paint on the back of this trailer.
Hope this helps and if you have any questions just ask!